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<font face="monospace">Hi Jason,<br>
<br>
For changing the FROM hdr (at INVITE time), better use the
uac_replace_from() function [1] - by doing this, the TM will
become aware of the change and reflect it into CANCEL too.<br>
<br>
<br>
[1]
<a class="moz-txt-link-freetext" href="https://opensips.org/html/docs/modules/3.4.x/uac.html#func_uac_replace_from">https://opensips.org/html/docs/modules/3.4.x/uac.html#func_uac_replace_from</a><br>
<br>
Regards,<br>
</font>
<pre class="moz-signature" cols="72">Bogdan-Andrei Iancu
OpenSIPS Founder and Developer
<a class="moz-txt-link-freetext" href="https://www.opensips-solutions.com">https://www.opensips-solutions.com</a>
<a class="moz-txt-link-freetext" href="https://www.siphub.com">https://www.siphub.com</a></pre>
<div class="moz-cite-prefix">On 24.12.2023 13:33, nz deals wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CALOQYisg-g=6xx=OJ_+1eQHPRE3BFFC9vswYso41wChzLXXZ6g@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="ltr">Hi Bogdan,
<div>Agreed that the RFC3261 CANCEL is truly built using INVITE.
In my case, somehow CANCEL is not the same as the initial
INVITE. Due to the complexity of my case I have hard times to
fix the issue. Let me explain a bit. </div>
<div>On the INVITE i change the From Header, which i can see has
also been changed during Authorization. </div>
<div>If i CANCEL then the From header is different (it's the
same as i have before making my change). </div>
<div><br>
</div>
<div>I am also using topology_hiding(). </div>
<div> </div>
<div><br>
</div>
<div><br>
</div>
<div>under the main route i change the From header for INVITE</div>
<div><br>
</div>
<div> set_advertised_address("104.13.xx.xx "); # same as
i have used in the advertised_address</div>
<div>
<div> # this is my cancel processing</div>
<div> if (is_method("CANCEL")) {<br>
if (t_check_trans())<br>
t_relay(8);<br>
exit;<br>
}</div>
</div>
<div> if (has_totag()) { </div>
<div> if(topology_hiding_match()) {</div>
<div> # remove and add a
custom one</div>
<div> remove_hf("From");</div>
<div> append_hf("From:
\"$fU\"<a class="moz-txt-link-rfc2396E" href="sip:$fU@$td;custom=$var(custom)"><sip:$fU@$td;custom=$var(custom)></a>;tag=$ft\r\n");</div>
<div>
force_send_socket("tls:192.xx.xx.xx:5061");</div>
<div> }</div>
<div> }</div>
<div> </div>
<div>My opensips version is 3.4.2</div>
<div>My listening socket is socket=tls:ens192:5061 tag ens192
(its the same 192.xx.xx.xx IP that you see in the
force_send_socket)</div>
<div>I am also using public ip as follows</div>
advertised_address=104.13.xx.xx<br>
alias=104.13.xx.xx<br>
<div> </div>
<div><br>
</div>
<div>Regards,</div>
<div>Jason </div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Thu, 21 Dec 2023 at 02:31,
Bogdan-Andrei Iancu <<a href="mailto:bogdan@opensips.org"
moz-do-not-send="true" class="moz-txt-link-freetext">bogdan@opensips.org</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote"
style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div> <font face="monospace">Hi Jason,<br>
<br>
In transactional stateful SIP, the CANCEL requests are hop
by hop - each hop in the path is generating its own CANCEL
requests to the next hop, which consumes it; there is no
actual relaying of the CANCELs. So, the replacing (which
works in relaying mode only) doesn't fit here.<br>
<br>
Even more, the RFC3261 gives a rigorous way for building
the CANCEL requests, they are to be built 100% based on
the INVITE request only (nothing more). OpenSIPS
internally builds the CANCEL in accordance to the
corresponding INVITE, so you should not need any such
changes.<br>
<br>
May you detail why you think you need this FROM
replacement?<br>
<br>
Regards, <br>
</font>
<pre cols="72">Bogdan-Andrei Iancu
OpenSIPS Founder and Developer
<a href="https://www.opensips-solutions.com" target="_blank"
moz-do-not-send="true" class="moz-txt-link-freetext">https://www.opensips-solutions.com</a>
<a href="https://www.siphub.com" target="_blank"
moz-do-not-send="true" class="moz-txt-link-freetext">https://www.siphub.com</a></pre>
<div>On 20.12.2023 12:38, nz deals wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">Hi,
<div>I've been attempting to modify the From header in
the CANCEL, but it seems the changes aren't taking
effect. I've also experimented with remove_hf and
append_hf, but unfortunately, these methods didn't
work either. Could someone kindly offer suggestions if
I might be overlooking something?<br>
</div>
<div><br>
</div>
<div>This is in the main request route </div>
<div><br>
</div>
if (is_method("CANCEL")) {<br>
uac_replace_from("","<a
href="mailto:sip%3Atest@test.com" target="_blank"
moz-do-not-send="true">sip:test@test.com</a>");<br>
if (t_check_trans())<br>
t_relay(8);<br>
exit;<br>
}<br>
<div>
<div><br>
</div>
<div><br>
</div>
<div><br>
</div>
<div>
<div>Regards,</div>
<div>Jason</div>
</div>
</div>
</div>
<br>
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